In the Europa League, their only rival seemed to be liverpool, which is also almost eliminated. There they are also the favourites for the cup. And in the Europa League it's much easier for them. They'll focus there with their minds at ease after Bundesliga title. Even if they don't win the Europa League, they have a perfect championship. They made such a good squad... to rest and change the offence and midfield, to stay at the same tempo and be undefeated champions is a very high level thing. There are no bad footballers, only uncooked footballers in the hands of a good manager. Xhaka was criticised and wanted to be sent off because his performance was very bad at Arsenal. Here he contributed a lot to bundesliga title and he will probably be very effective winning the Europa League title.
If Liverpool are eliminated by Atalanta then Leverkusen will be the favorite team to win the Europa League this season, no one has been able to stop Xabi fleet so far. The competition for the trophy in the Bundesliga has been completed perfectly, now Xabi will be a little more relaxed and just needs to keep his unbeaten record safe.
Xabi next focus is the Europa League, West Ham needs a miracle to turn things around, Leverkusen has a 2 goal advantage at the moment. Xabi has the freedom to rest his key players for domestic competitions, and he will field his best squad in Europa League matches. Meanwhile, for other competitions such as the DFB Pokal, Leverkusen will not be too worried because they will face relatively easy opponents.
Regarding Xhaka, he is the brains of Leverkusen game this season, all of Xabi words and instructions are converted well by him on the pitch. His vital role in midfield made Leverkusen game more effective, Xabi succeeded in providing the best role to unleash Xhaka potential. Arsenal failed to see the maturity possessed by Xhaka, a very impressive first season at Leverkusen.